Postpublished at 17:29 British Summer Time 28 September 2019
Radabe Arafi took the second automatic place in the final, by the way.
Catch-up: Women's & men's 50km walk finals and day two highlights
US sprinter Christian Coleman wins men's 100m gold in 9.76 secs
Jamaican Tajay Gayle triumphs in men's long jump final
Dutch runner Sifan Hassan wins women's 10,000m; hammer gold for USA's DeAnna Price
GB's Dina Asher-Smith wins women's 100m heat
Use play icon to watch live coverage from Doha (UK only)
Tom Rostance and Luke Reddy
Radabe Arafi took the second automatic place in the final, by the way.
These conditions are punishing for athletes and maybe they got the better of Shelayna Oskan-Clarke there. Her legs just went.
Shelayna Oskan-Clarke is out! She stumbles in the last 20m and goes down. Out of the champs.
Ajee Wilson wins it.
Slow first lap. Tactical.
Ajee Wilson has made a customary fast start, Shelayna gets up on her shoulder. Don't get boxed in.
Women's 800m
All eyes on Shelayna Oskan-Clarke then. Top two go through by right.
Women's hammer final
Olympic champion Anita Wlodarczyk is missing with a knee injury so DeAnna Price of the United States starts as favourite. She topped qualifying with a throw of 73.77m.
Women's 800m
Aside from event favourite Ajee Wilson, there’s no-one in this semi-final for Shelayna Oskan-Clarke to fear. The Brit’s medal prospects have improved after team-mate Lynsey Sharp’s failure to progress beyond the heats.
Can she get in the final?
Women's 800m semi-finals
Steve Cram
BBC Sport athletics commentator in Doha
Alex Bell just didn't get into it. We saw signs in the heat yesterday that she wasn't as ready as she wanted to be. It was a race which should have suited her.
Saj Chowdhury
BBC Sport in Doha
Christian Coleman could probably stop for a cuppa en route and still win the 100m final later (20:15 BST).
The other two medals appear up for grabs with Briton Zharnel Hughes in the mix.
He afforded himself a smile as he crossed the line after a very relaxed display. South Africa's Akani Simbine, Canada Andre de Grasse and defending champion Justin Gatlin, jeered by a minority when his name was read out, will likely be his rivals.
Raevyn Rogers and Winnie Nanyondo control that race to take the top two spots in a shade under two minutes - Alex Bell is OUT.
Alex Bell is fourth at the bell.
Raevyn Rogers has cleared off - off to a flier .
They're off!
Women's 800m semis
Having overcome a bad position to reach the semi-final, Bell said: “I like a bit of excitement to get the party started!”.
Potential party poopers for the Brit include American Raevyn Rogers and Winnie Nanyondo of Uganda.
Women's 800m semis
Alex Bell of GB is up in the first 800m semi. The first two go through to the final.
Michael Johnson
Four-time Olympic gold medallist athlete on BBC TV
I think the second semi-final taught us the most. We thought Blake and Gatlin would be in there but Gatlin, I think he is struggling a bit at this point. He may still be there in the medals in the final. Blake, I'm not sure what that was. Coleman is out there in a class by himself but I think there are four or five athletes out there for those silver and bronze medals.
Coleman, I don't think anyone can run with him. He's in a class all by himself.
It's at 20:15 BST. Check in with us then.
Saj Chowdhury
BBC Sport in Doha
One thing noticeable is the absence of Falah the Falcon greeting winners at the end of the race - it's usually mascot protocol at these championships.
I mean, who wouldn't want to be dressed in a falcon suit in these conditions?!
Not that it would have caught Christian Coleman who rushed off for a cool-down.